/Engine/Plugins/Online/OnlineServicesEOS/Source/Public/Online/AuthEOS.h
static [FAccountId](API\Runtime\CoreOnline\Online\FAccountId) CreateAccountId ( const [EOS_EpicAccountId](API\Plugins\OnlineServicesEOS\Online\EOS_EpicAccountId) EpicAccountId, const EOS_ProductUserId ProductUserId )